Tack-pulling attachment for sewing-machines



(No Model.) I

J. E. BERTRAND. TACK PULLING ATTACHMENT FOR SEWING MACHINES.

No. 545,669. Patented Sept. 3,1895.

M 6 Gym/mi. v fise hmwemmmj UNITED STATES PATENT OFFICE,

JOSEPH ELI BERTRAND, OF BOSTON, ASSIGNOR OF ONE-HALF TO MELLEN BRAY, OF NEWTON, MASSACHUSETTS.

TACK-PULLING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 545,ee9, aateu September 3, 1895.

' Application filed February 18, 1895, Serial No. 538| (N m To aZZ whom it may concern.- 7

Be it known that LJOSEPHELI BERTRAND, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in TaokPulling Attachments for Sewing-Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to tack-pullin g attachto ments for shoe-sewing machines for removing the lasting-tacks from boots or shoes during the process of sewing the uppers to the soles in the case of turned shoes or to the inner soles in the case of welted boots or shoes, so I 5 that said tacks shall not interfere with the operations of the needle or awl; and it consists in certain novel features of construction, arrangment, and combination of parts, which will be readily understood by reference to the description of the accompanying drawings and to the claims hereto appended, and in which my invention is clearly pointed out.

In the manufacture of welted or turned shoes as generally practiced the upper is 2 5 lasted and secured to the sole by means of lasting-tacks driven through said upper and sole and into the last with a considerable por-' tion of their lengths projecting outward therefrom. The lasted shoe is allowed to stand 0 until the upper is dried, when the lastingt-acks are removed and other tacks having very slight and short shanks are substituted therefor, and the upper or upper and welt are then sewed to the solo. The lasting-tacks are 3 5 removed by hand, and when the shoe has been sewed the smaller tacks have also to be removed by hand, all of which takes considerable time and adds to the cost of manufacture.

To obviate this expense is the object of my present invention, and to this end I add a simple attachment to the shoe-sewing machine by which, without increasing the movements to be performed by the machine, the 4 5 lasting-tacks may operation of sewing, but alittle in advance of the sewing, and the use of the second set of tacks be entirely dispensed with, all as illustrated in the accompanying drawings, in which trate my invention.

be removed during the Figure l is a front elevation of so much of a shoe-sewing machine as is necessary to illus- Fig. 2 is a sectional elevation of the same parts, looking toward the left of Fig. 1, the cutting-plane being on line 2 2 on Fig. 1, but showing the tack-puller, which is at the right of said line, in elevation. Fig. 3 is a sectional elevation, looking toward the right of Fig. 1, the cutting-plane being on line 3 3 on Fig. 1; and Figs. 4 and 5 are respectively a front elevation and a side elevation of the tack-pulling tool.

In the drawings, A represents a small portion of the bed of the head of the machine.

B and B are the two stands secured to said bed and having secured thereto the shuttlerace 0.

D is the shuttle.

15 is a shaft mounted in hearings in the upper ends of the stands B and B, E the needle and awl carrying arm, 0 the needle-guide, and d the loop-spreader, all constructed, arranged, and operating substantially as shown and described in the Letters Patent No. 432,011, granted to me July 15, 1890.

The parts of the machine not shown in the accompanying drawings are constructed, arranged, and operate the same as shown and described in said cited prior patent, and as they form no part of my present invention they are omitted in order to the more clearly illustrate the special features of my present invention.

The arm E has secured thereto and projecting from one edge thereof the needle e, 8; bent to a curve concentric to the axis of the shaft b,and projecting from the opposite edge thereof the awl f, also bent to the same curve.

F is the work-support, secured to the stand B and having its upper end constructed and arranged to enter the channel in the sole g of the shoe G, as shown in Fig. 2.

His the presser-foot, mounted upon the hub of the lever I, firmly secured upon the shaft b, and carrying the Welt-guide J, and his the 5 upper needle guide or stay, the movable end of which enters a slot in the presser-foot and moves therewith.

The construction, arrangement, and operation of the resser-foot, needle-stay, and welt- I00 guide are substantially the same as shown and described in the Letters Patent No. 502,875, granted to me August 8, 1893.

L is the tack-pulling blade, firmly secured to the needle and awl carrying arm by means of the same bolt that clamps the awl in p0sition, as shown at 1', Figs. 1 and 2. This blade is bent to a curve concentric to the axis of the shaft b and has its Working end made wider than the length of the longest stitch to be sewed and serrated or provided with a series of teeth to engage the lasting-tacks, one of which is shown atj in Fig. 2, as said blade is moved about the axis of the shaft b in the direction for the awl f to pierce the work and withdraw them from the work. Each time that the awl descends to pierce the work the blade L descends in like manner, but in a path somewhat nearer the axis of the shaft 6 than that in which the awl moves and a short distance to the right of said awl, and as the work is fed toward the left said blade engages and removes each tack in succession before it reaches the'path of the awl and needle.

This makes a very effective tack-puller and adds nothing to the cost of the sewing-machine, except the cost of making this simple curved and toothed blade and making the bolt 2' about an eighth of an inch longer than before.

What I claim as new, and desire to secure by Letters Patentof the United States, is

1. The combination of an oscillating needle and awl carrying arm; a curved awl and a curved needlecarried thereby; a work support constructed and arranged to enter the channel of the sole; a presser foot to bear upon the upper or welt; a tack pulling blade carried by said needle and awl carrying arm; and means for oscillating said arm.

2. The combination of an oscillating needle and awl carrying arm; a needle and awl carried by said arm and curved to an arc of a circle concentric to the axis of said arm; a work support constructed and arranged to enter the channel of the sole; a looper; a thread carrier; a shuttle; a tack pulling blade carried by said needle and awl carrying arm and curved to an arc of a circle parallel to said awl or needle but of a' somewhat less radius and having aseries of teeth formed on its working end, and adapted to engage and withdraw any lasting tack that may be in its path when the awl descends to pierce the work.

In testimony whereof I have signed my name to this specificatiomin the presence of two subscribing witnesses, on this 13th day of February, A. D. 1895.

JOSEPH ELI BERTRAND.

Witnesses:

N. O. LOMBARD,

WALTER E. LOMBARD. 

